Micro Engine Roll and Pitch Attitude Test Bench

Abstract

The present invention relates to a micro-engine test bench. A roll and pitch attitude test bench for a micro-engine, comprising a micro-engine and a support base, is characterized in that it further comprises a pitch test bench, which is mounted on the support base through a pitch device for driving its pitching motion; the micro-engine is fixedly mounted on a roll table, and the roll table is further mounted on the pitch test bench through a roll device for driving its rolling motion; a vibration sensor, a rotational speed sensor, an inclination sensor, and a tail nozzle temperature sensor are provided on the roll table, and all of them send induction signals to an electrical control cabinet. At the same time, the electrical control cabinet is also electrically connected to the pitch device and the roll device for controlling the pitch device and the roll device. The present invention realizes the precise control of the pitch angle and roll angle of a turbojet engine, simulates the real attitude of the micro-turbojet engine in the air, and accurately obtains various technical parameters when the micro-turbojet engine rolls and pitches.

Description

Technical Field

[0001] The present invention relates to a micro-engine test bench. Background Art

[0002] Aero-engine technology has always been regarded as "the pearl on the crown of industrial technology". Aero-engines provide the power required for aircraft to fly. The rapid development of small aircraft, general aviation aircraft and unmanned aircraft has put forward higher requirements for the performance of micro-turbojet engines. At present, most of the test benches for micro-turbojet engines are fixed and simple test benches, which cannot simulate various pitching motions of an aircraft in the air.

[0003] In the utility model patents and invention patents with publication numbers CN 208076159 U and CN 108387379 A, a micro and small turbine engine test bench is proposed, which is mainly used for the installation and testing of micro-turbojet engines and micro-turboprop engines. By adjusting different brackets, it is applicable to different types of turbine engines, and can monitor and record data such as the rotational speed and temperature of the engine in real time.

[0004] In the invention patent with publication number CN 102507204 A, a movable micro and small turbojet engine test bench is proposed, which mainly includes a test bench frame and a control cabinet, and mainly measures parameters such as the rotational speed, intake air flow rate, fuel consumption rate, temperature and pressure after the compressor of a micro-turbojet engine.

[0005] In the utility model patent with publication number CN 202693314 U, a turbojet engine test bench is proposed. It is used to test the thrust, temperature and rotational speed of a small turbojet engine, and is convenient to move, and can conduct static tests of the engine in various scenarios.

[0006] With the development of technology in recent years, micro-aircraft have developed rapidly. Common small consumer-grade aircraft mostly use electric motors as power sources, and quadcopters are the most common. Large-scale model aircraft, industrial-grade aircraft, and general aviation / unmanned aircraft mainly use micro-turbine engines as the main power source. The most common power source is the micro-turbojet engine.

[0007] The patents with publication numbers CN 208076159 U, CN 108387379 A, CN 102507204 A and CN202693314 U in the above patents all propose a test bench for measuring micro-turbojet engines, which can measure data such as the rotational speed, temperature and thrust of micro and small turbojet engines. However, the test bench with such a structure can only test various technical parameters of a micro-turbojet engine in a fixed posture, and cannot simulate the real posture of an aircraft engine in the air, that is, the rolling and pitching postures. Therefore, the technical parameters of an aircraft engine in the actual posture in the air cannot be obtained either. Summary of the Invention

[0008] The object of the present invention is to avoid the deficiencies of the prior art and provide a micro-engine attitude test bench that can simulate the real attitude of a micro-engine rolling and pitching in the air and measure the technical parameters of the micro-turbojet engine in the instantaneous attitude under the real attitude.

[0009] To achieve the above object, the technical solution adopted by the present invention is: a micro-engine rolling and pitching attitude test bench, including a micro-engine, a support base, and further including a pitching test bench, the pitching test bench is installed on the support base through a pitching device that drives it to perform pitching and raising movements; the micro-engine is fixedly installed on a rolling table, and the rolling table is installed on the pitching test bench through a rolling device that drives it to perform rolling movements, and a tension and compression sensor is installed on the pitching test bench below the rolling device; a pressure sensor, a post-compressor temperature sensor are provided on the micro-engine, and a quick-connect oil pipe is installed on the side of the front intake port of the micro-engine; a vibration sensor, a rotational speed sensor, an inclination sensor, and a tail nozzle temperature sensor are provided on the rolling table; it also includes a data acquisition card and a flow meter installed on the lower support platform, and engine kerosene is connected to the quick-connect oil pipe of the micro-turbojet engine through the flow meter; the vibration sensor, the rotational speed sensor, the inclination sensor, the tail nozzle temperature sensor, the post-compressor temperature sensor, the pressure sensor, and the tension and compression sensor all send induction signals to the data acquisition card, and are converted into digital signals through the data acquisition card and then transmitted to the electrical control cabinet, and the electrical control cabinet is also electrically connected to the pitching device and the rolling device for controlling the pitching device and the rolling device.

[0010] Further, the pitching device includes two connecting shafts provided on the bottom of the pitching test bench through a connecting shaft bracket, and the two connecting shafts are arranged corresponding to the front and rear ends of the micro-engine; one of the connecting shafts movably penetrates through a hole at one end of the support rib plate, and the other end of the support rib plate is fixedly arranged on the support base; it also includes a servo electric cylinder, and a servo electric cylinder upper bracket provided at the upper end of the servo electric cylinder is movably connected to the other connecting shaft; a servo electric cylinder lower bracket connecting shaft is fixedly installed on the support base through a second connecting shaft bracket, and a servo electric cylinder lower bracket provided at the lower end of the servo electric cylinder is movably connected to the lower bracket connecting shaft, and the servo electric cylinder is electrically connected to the electrical control cabinet, and the electrical control cabinet controls the up and down movement of the servo electric cylinder to realize the pitching and raising movements of the pitching test bench.

[0011] Further, the support base includes an upper support plate, a lower support plate and a vertical plate, the upper support plate is arranged at the upper part on one side of the vertical plate, the lower support plate is arranged at the lower part on the other side of the vertical plate, the support rib plate is fixedly arranged on the upper support plate, and the lower bracket connecting shaft is fixedly arranged on the lower support plate.

[0012] Furthermore, the rolling device includes a rolling table, which is installed on the rolling table bracket through a support rotor. The rolling table bracket is arranged on the pitching test bench. The rolling table rotates along the axis of the micro engine. The rolling table has a semi-arc-shaped groove with a semi-arc-shaped cross-section. The micro engine is fixedly installed in the semi-arc-shaped groove of the rolling table. A gear is provided on the outer surface at one end of the rolling table, and the gear meshes with the motor gear. The motor drives the motor gear to drive the rolling table to rotate; the electrical control cabinet controls the motor to realize the rotation of the rolling table.

[0013] Furthermore, a rolling table fixing block is also provided at one end of the rolling table, and the rolling table fixing block is fixedly installed on the pitching test bench; a fixing block bearing is provided on the rolling table fixing block, and the fixing block bearing presses against the inner side of the semi-arc-shaped groove of the rolling table.

[0014] Furthermore, a slideway groove is provided at the bottom of the rolling table in the rolling direction of the rolling table, and the tensile and compressive force sensor is arranged in the slideway groove.

[0015] Furthermore, sensor installation platforms are provided along both sides of the semi-arc-shaped groove of the rolling table. The rotational speed sensor is installed on the sensor installation platform through a rotational speed sensor positioning plate, the inclination sensor is fixed on the sensor installation platform by bolts, and the tail nozzle temperature sensor is supported at the outlet of the tail nozzle of the micro engine through two sensor fixing rings correspondingly arranged on the sensor installation platform.

[0016] Furthermore, the micro engine is fixed in the semi-arc-shaped groove of the rolling table through a positioning ring, and the vibration sensor is installed on the positioning ring.

[0017] Furthermore, the pressure sensor and the temperature sensor after the compressor are installed at the compressor outlet section of the micro engine and are symmetrically arranged in the direction perpendicular to the axis of the micro engine. The quick connector of the oil pipe is arranged on the side of the front air inlet of the micro engine.

[0018] Furthermore, at least two data acquisition cards are included, and they are respectively installed on both sides of the support base; an industrial control computer is installed in the electrical control cabinet. A console is provided on the electrical control cabinet. A display and a control console for controlling the pitching device and the rolling device are installed on the console. The display and the control console are respectively electrically connected to the industrial control computer. The noise sensor is built in the console; the data collected by the tensile and compressive force sensor, the rotational speed sensor, the vibration sensor, the tail nozzle temperature sensor, the pressure sensor, the temperature sensor after the compressor, and the inclination sensor are all received by the data acquisition card, converted into digital signals, and then transmitted to the industrial control computer and displayed on the display of the console; through the pitching angle value and the calculation program of the industrial control computer, the final thrust value at different angles is output on the display.

[0019] The beneficial effects of the present invention are as follows: The present invention mainly tests a micro turbojet engine, measures various technical parameters of the micro turbojet engine when it works at different pitch and roll angles. The angles can be precisely controlled through a servo motor, a servo electric cylinder, and an inclination sensor. A thrust sensor measures the thrust in the axial direction of the engine, and then the influence of the engine's own gravity is removed through a built-in program to calculate the thrust in the pitch attitude. In addition, temperature, rotation speed, and thrust sensors are installed to collect data such as the temperature, rotation speed, and pressure of the micro turbojet engine in real time. It can simulate various roll and pitch postures of the micro turbojet engine in the air, achieving the purpose of measuring parameters such as the instantaneous pitch angle, roll angle, thrust, vibration, rotation speed, fuel consumption rate, temperature and pressure after the compressor, and temperature of the tail nozzle of the turbojet engine. It truly realizes the precise control of the pitch angle and roll angle of the turbojet engine, simulates the real posture of the micro turbojet engine in the air, and accurately obtains various technical parameters when the micro turbojet engine rolls and pitches, improving reliability and providing data for the factory inspection of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the front axonometric view of the roll and pitch attitude test bench of the micro turbojet engine of the present invention;

[0021] Figure 2 is the bottom axonometric view of the roll and pitch attitude test bench of the micro turbojet engine of the present invention;

[0022] Figure 3 is the side view of the roll and pitch attitude test bench of the micro turbojet engine of the present invention;

[0023] Figure 4 is the front view of the micro turbojet engine of the present invention;

[0024] Figure 5 is the axonometric view of the control console of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0026] Example 1: As Figures 1 to 5As shown in the figure, a roll and pitch attitude test bench for a micro engine includes a micro engine 1 and a support base 14, and also includes a pitch test bench 16. The pitch test bench 16 is installed on the support base 14 through a pitch device that drives it to perform pitching and rolling motions; the micro engine 1 is fixedly installed on a roll table 23, and the roll table 23 is installed on the pitch test bench 16 through a roll device that drives it to perform rolling motions. A tension and compression sensor 34 is installed on the pitch test bench 16 below the roll device; a pressure sensor 22, a post-compressor temperature sensor 30 are provided on the micro engine 1, and a quick-connect oil pipe joint 20 is installed on the side of the front air inlet of the micro engine 1; a vibration sensor 6, a rotational speed sensor 7, an inclination sensor 9, and a tail pipe temperature sensor 2 are provided on the roll table 23; it also includes a data acquisition card 10 and a flow meter 27 installed on the lower support platform 14. The engine kerosene is connected to the quick-connect oil pipe joint 20 of the micro turbojet engine through the flow meter 27; the vibration sensor 6, the rotational speed sensor 7, the inclination sensor 9, the tail pipe temperature sensor 2, the post-compressor temperature sensor 30, the pressure sensor 22, and the tension and compression sensor 34 all send induction signals to the data acquisition card 10, and are converted into digital signals through the data acquisition card 10 and then transmitted to an electric control cabinet 31. At the same time, the electric control cabinet 31 is also electrically connected to the pitch device and the roll device for controlling the pitch device and the roll device.

[0027] The pitch device includes two connecting shafts 24 provided at the bottom of the pitch test bench 16 through a connecting shaft bracket, and the two connecting shafts 24 are arranged corresponding to the front and rear ends of the micro engine 1; one of the connecting shafts 24 movably passes through a hole at one end of a support rib plate 25, and the other end of the support rib plate 25 is fixedly arranged on the support base 14; it also includes a servo electric cylinder 13. The upper servo electric cylinder support bracket 35 provided at the upper end of the servo electric cylinder 13 is movably connected to the other connecting shaft 24; a lower servo electric cylinder support connecting shaft 24 is fixedly arranged on the support base 14 through a second connecting shaft bracket, and the lower servo electric cylinder support bracket 36 provided at the lower end of the servo electric cylinder 13 is movably connected to the lower support connecting shaft 24. The servo electric cylinder 13 is electrically connected to the electric control cabinet 31, and the electric control cabinet 31 controls the up and down movement of the servo electric cylinder 13 to realize the pitching and rolling motions of the pitch test bench 16.

[0028] The support base 14 includes an upper support plate, a lower support plate and a vertical plate. The upper support plate is arranged at the upper part on one side of the vertical plate, and the lower support plate is arranged at the lower part on the other side of the vertical plate. The support rib plate 25 is fixedly arranged on the upper support plate, and the lower support connecting shaft 24 is fixedly arranged on the lower support plate.

[0029] The described roll device includes a roll table 23. The roll table 23 is mounted on a roll table bracket 5 through a support rotor 4. The roll table bracket 5 is arranged on a pitch test bench 16. The roll table 23 rotates along the axis of the microengine 1. The roll table 23 has a semi-circular arc-shaped groove with a semi-circular arc-shaped cross-section. The microengine 1 is fixedly installed in the semi-circular arc-shaped groove of the roll table. A gear 18 is provided on the outer surface at one end of the roll table 23. The gear 18 meshes with a motor gear 11. The motor 15 drives the motor gear 11 to drive the roll table 23 to rotate. The electric control cabinet 31 controls the motor 15 to realize the rotation of the roll table 23. A roll table fixing block 17 is also provided at one end of the roll table 23. The roll table fixing block 17 is fixedly installed on the pitch test bench 16. A fixing block bearing 19 is provided on the roll table fixing block 17. The fixing block bearing 19 presses tightly against the inner side of the semi-circular arc-shaped groove of the roll table 23. A slideway groove is provided at the bottom of the roll table 23 in the rolling direction of the roll table 23, and a pull and pressure sensor 34 is arranged in the slideway groove. Sensor mounting platforms are provided on both sides along the semi-circular arc-shaped groove of the roll table 23. The rotational speed sensor 7 is installed on the sensor mounting platform through a rotational speed sensor positioning plate 8. The inclination sensor 9 is fixed to the sensor mounting platform by bolts. The tail nozzle temperature sensor 2 is supported at the outlet of the tail nozzle of the microengine 1 through two sensor fixing rings 3 correspondingly arranged on the sensor mounting platform. The microengine 1 is fixed in the semi-circular arc-shaped groove of the roll table 23 through a positioning ring 21. The vibration sensor 6 is installed on the positioning ring 21.

[0030] The described pressure sensor 22 and the compressor rear temperature sensor 30 are installed at the compressor outlet section of the microengine 1 and are symmetrically arranged in the direction perpendicular to the axis of the microengine 1. The quick oil pipe joint 20 is arranged on the side of the front air inlet of the microengine 1.

[0031] At least two data acquisition cards 10 are included and are respectively installed on both sides of the support base 14. An industrial control computer is installed in the electric control cabinet 31. A console 31 is provided on the electric control cabinet 31. A display 32 and a control console 33 for controlling the pitch device and the roll device are installed on the console 31. The display 32 and the control console 33 are respectively electrically connected to the industrial control computer. A noise sensor is built into the console 31. The data collected by the pull and pressure sensor 34, the rotational speed sensor 7, the vibration sensor 6, the tail nozzle temperature sensor 2, the pressure sensor 22, the compressor rear temperature sensor 30, and the inclination sensor 9 are received by the data acquisition card 10, converted into digital signals, and then transmitted to the industrial control computer, and are displayed on the display 32 of the console 31. Through the pitch angle value and calculation program of the industrial control computer, the final thrust value at different angles is output on the display 32.

[0032] When the test is officially carried out, first start the engine, and various technical parameters of the engine detected by the above-mentioned various sensors are displayed on the display 32, including thrust, rotational speed, vibration, compressor temperature, compressor pressure, jet temperature of the tail nozzle, fuel flow rate, and pitch angle and roll angle; by operating the pitch button on the console 33, control the telescopic movement of the servo electric cylinder. At this time, the pitch platform 16 starts to turn until it reaches the limit value of the pitch angle. It is also possible to make the pitch angle be in a certain given position or a given change rate of roll and pitch angles through the roll stop button on the console 33, so that the engine attitude test bench rolls and pitches at a given rate; it is also possible to make the pitch angle be in a certain given position through the roll stop button on the console 33. At the same time, by operating the roll button on the console 33, control the servo motor 15 to make the roll table 23 roll or stop rolling, simulating the roll and pitch attitude of the micro turbojet engine 1 in the air; the change rate of roll and pitch angles can be given by the industrial control computer, so that the engine attitude test bench rolls and pitches at a given rate, and various technical parameters of the engine under the actual attitude in the air can be obtained.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A roll and pitch attitude test bench for a micro engine, comprising a micro engine and a support base, characterized in that, It also includes a pitch test bench, which is installed on the support base through a pitch device that drives it to perform pitch-up and pitch-down movements; the micro engine is fixedly installed on the roll table, and the roll table is installed on the pitch test bench through a roll device that drives it to perform roll movements. The tensile and compressive force sensor is installed on the pitch test bench below the roll device; a pressure sensor, a post-compressor temperature sensor, and a quick-connect fuel pipe joint installed on the side of the front intake port of the micro engine are provided on the micro engine; a vibration sensor, a rotational speed sensor, an inclination sensor, and a tail nozzle temperature sensor are provided on the roll table; it also includes a data acquisition card and a flow meter installed on the lower support platform, and the engine kerosene is connected to the quick-connect fuel pipe joint of the micro turbojet engine through the flow meter; the vibration sensor, the rotational speed sensor, the inclination sensor, the tail nozzle temperature sensor, the post-compressor temperature sensor, the pressure sensor, and the tensile and compressive force sensor all send the induction signals to the data acquisition card, and are converted into digital signals through the data acquisition card and then transmitted to the electrical control cabinet. The electrical control cabinet is also electrically connected to the pitch device and the roll device for controlling the pitch device and the roll device; The pitch device includes two connecting shafts provided at the bottom of the pitch test bench through connecting shaft brackets, and the two connecting shafts are arranged corresponding to the front and rear ends of the micro engine; one of the connecting shafts movably passes through the hole at one end of the support rib plate, and the other end of the support rib plate is fixedly arranged on the support base; it also includes a servo electric cylinder, and the servo electric cylinder upper support provided at the upper end of the servo electric cylinder is movably connected to the other connecting shaft; a servo electric cylinder lower support connecting shaft is fixedly installed on the support base through a second connecting shaft bracket, and the servo electric cylinder lower support provided at the lower end of the servo electric cylinder is movably connected to the lower support connecting shaft. The servo electric cylinder is electrically connected to the electrical control cabinet, and the electrical control cabinet controls the up and down movement of the servo electric cylinder to realize the pitch-up and pitch-down movements of the pitch test bench; The roll device includes a roll table, and the roll table is installed on the roll table bracket through a support rotor. The roll table bracket is arranged on the pitch test bench, and the roll table rotates along the axis of the micro engine. The roll table has a semi-circular groove, and its cross-section is semi-circular. The micro engine is fixedly installed in the semi-circular groove of the roll table. A gear is provided on the outer surface at one end of the roll table, and the gear meshes with the motor gear. The motor drives the motor gear to drive the roll table to rotate; the electrical control cabinet controls the motor to realize the rotation of the roll table; A roll table fixing block is also provided at one end of the roll table, and the roll table fixing block is fixedly installed on the pitch test bench; a fixing block bearing is provided on the roll table fixing block, and the fixing block bearing presses against the inner side of the semi-circular groove of the roll table; A slideway groove is provided at the bottom of the roll table in the rolling direction of the roll table, and the tensile and compressive force sensor is arranged in the slideway groove; Sensor mounting platforms are provided on both sides of the semi-circular arc-shaped groove of the rolling table. The rotation speed sensor is mounted on the sensor mounting platform through a rotation speed sensor positioning plate, and the inclination sensor is fixed on the sensor mounting platform by bolts. The tail nozzle temperature sensor is supported at the outlet of the tail nozzle of the micro-engine by two sensor fixing rings correspondingly arranged on the sensor mounting platform.

2. The roll and pitch attitude test bench for a micro engine according to claim 1, characterized in that, The support base includes an upper support plate, a lower support plate and a vertical plate. The upper support plate is arranged at the upper part on one side of the vertical plate, and the lower support plate is arranged at the lower part on the other side of the vertical plate. The support rib plate is fixedly arranged on the upper support plate, and the lower bracket connecting shaft is fixedly arranged on the lower support plate.

3. The roll and pitch attitude test bench for a microengine according to claim 1, characterized in that, The micro-engine is fixed in the semi-circular arc-shaped groove of the rolling table through a positioning ring, and the vibration sensor is mounted on the positioning ring.

4. The roll and pitch attitude test bench for a micro engine according to claim 1, characterized in that, The pressure sensor and the temperature sensor behind the compressor are mounted at the outlet section of the compressor of the micro-engine and are symmetrically arranged in the direction perpendicular to the axis of the micro-engine. The quick oil pipe joint is arranged on the side of the front air inlet of the micro-engine.

5. The microengine roll and pitch attitude test bench according to any one of claims 1-4, characterized in that, There are at least two data acquisition cards, which are respectively mounted on both sides of the support base. An industrial control computer is installed in the electrical control cabinet. A console is provided on the electrical control cabinet. A display and a control console for controlling the pitching device and the rolling device are installed on the console. The display and the control console are respectively electrically connected to the industrial control computer. The data collected by the tension and compression sensor, the rotation speed sensor, the vibration sensor, the tail nozzle temperature sensor, the pressure sensor, the temperature sensor behind the compressor and the inclination sensor are received by the data acquisition card, converted into digital signals and then transmitted to the industrial control computer, and are displayed on the display of the console. Through the pitching angle value and the calculation program of the industrial control computer, the final thrust value at different angles is output on the display.

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